linux-kernel - Re: [PATCH v3 2/7] tpm_tis: Disable interrupt auto probing on a per-device basis

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Date:	Mon, 4 Jan 2016 20:32:42 +0200
From:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:	tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	Martin Wilck <Martin.Wilck@...fujitsu.com>,
	Peter Huewe <peterhuewe@....de>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Subject: Re: [PATCH v3 2/7] tpm_tis: Disable interrupt auto probing on a
 per-device basis

On Mon, Jan 04, 2016 at 11:24:42AM -0700, Jason Gunthorpe wrote:
> On Sun, Jan 03, 2016 at 07:20:40PM +0200, Jarkko Sakkinen wrote:
> > On Thu, Dec 17, 2015 at 11:23:15AM -0700, Jason Gunthorpe wrote:
> > > Instead of clearing the global interrupts flag when any device
> > > does not have an interrupt just pass -1 through tpm_info.irq.
> > > 
> > > The only thing that asks for autoprobing is the force=1 path.
> > 
> > Sorry for my ignorance but what does this patch help? Why interrupts
> > flag is not enough?
> 
> It is wrong for a driver's probe function to change global state, and
> very wrong to change a module option.

I disagree about global state in some sense but module options should
stay static. That's much better argument.

> > > Signed-off-by: Jason Gunthorpe <jgunthorpe@...idianresearch.com>
> > > Tested-by: Wilck, Martin <martin.wilck@...fujitsu.com>
> > > Tested-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> > 
> > Did I already give Tested-by's for this series (I did for those that
> > went into v4.5 pull request)?
> 
> You said you tested the crb stuff, which is this series... Did you
> test something else?

Checked my emails. Right I did run my tests for this (both with FIFO
and CRB driver). It was bit "stormy" before Christmas with all kinds
of small patches so I wasn't sure.

Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>

> Jason

/Jarkko
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